/*===========================================================================*\
*                                                                           *
*                               OpenMesh                                    *
*      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen      *
*                           www.openmesh.org                                *
*                                                                           *
*---------------------------------------------------------------------------* 
*                                                                           *
*                                License                                    *
*                                                                           *
*  This library is free software; you can redistribute it and/or modify it  *
*  under the terms of the GNU Library General Public License as published   *
*  by the Free Software Foundation, version 2.                              *
*                                                                           *
*  This library is distributed in the hope that it will be useful, but      *
*  WITHOUT ANY WARRANTY; without even the implied warranty of               *
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
*  Library General Public License for more details.                         *
*                                                                           *
*  You should have received a copy of the GNU Library General Public        *
*  License along with this library; if not, write to the Free Software      *
*  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
*                                                                           *
\*===========================================================================*/

//=============================================================================
//
//  CLASS newClass - IMPLEMENTATION
//
//=============================================================================


//== INCLUDES =================================================================

#include <Tools/VDPM/VFront.hh>

//== NAMESPACES ===============================================================

namespace OpenMesh {
	namespace VDPM {

		//== IMPLEMENTATION ========================================================== 


		VFront::VFront()
		{  
		}


		void
			VFront::
			add(VHierarchyNodeHandle _node_handle)
		{
			front_location_[_node_handle.idx()] = front_.insert(front_.end(), _node_handle);
		}


		void
			VFront::
			remove(VHierarchyNodeHandle _node_handle)
		{
			VHierarchyNodeHandleListIter node_it = front_location_[_node_handle.idx()];
			VHierarchyNodeHandleListIter next_it = front_.erase(node_it);
			front_location_[_node_handle.idx()] = front_.end();

			if (front_it_ == node_it)
				front_it_ = next_it;
		}

		bool
			VFront::
			is_active(VHierarchyNodeHandle _node_handle)
		{
			return  (front_location_[_node_handle.idx()] != front_.end()) ? true : false;
		}

		void 
			VFront::
			init(VHierarchyNodeHandleContainer &_roots, unsigned int _n_details)
		{
			unsigned int i;

			front_location_.resize(_roots.size() + 2*_n_details);
			for (i=0; i<front_location_.size(); ++i)
				front_location_[i] = front_.end();

			for (i=0; i<_roots.size(); ++i)
				add(_roots[i]);
		}


		//=============================================================================
	} // namespace VDPM
} // namespace OpenMesh
//=============================================================================
